Nutrient Interactions and Deficiency Diagnosis in the Lettuce V. Potassium Content and Response to Potassium

Abstract

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for these elements. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of potassium was supplied.